KR20140145083A - Method for producing a built hollow valve - Google Patents

Method for producing a built hollow valve Download PDF

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Publication number
KR20140145083A
KR20140145083A KR20140070708A KR20140070708A KR20140145083A KR 20140145083 A KR20140145083 A KR 20140145083A KR 20140070708 A KR20140070708 A KR 20140070708A KR 20140070708 A KR20140070708 A KR 20140070708A KR 20140145083 A KR20140145083 A KR 20140145083A
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KR
South Korea
Prior art keywords
valve
cone
valve stem
stem
hollow
Prior art date
Application number
KR20140070708A
Other languages
Korean (ko)
Inventor
피터 크루스
크리스토프 루벤
알렉산더 뮐러
알렉산더 퍽
Original Assignee
말레 인터내셔널 게엠베하
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 말레 인터내셔널 게엠베하 filed Critical 말레 인터내셔널 게엠베하
Publication of KR20140145083A publication Critical patent/KR20140145083A/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
    • F01L3/20—Shapes or constructions of valve members, not provided for in preceding subgroups of this group
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K15/00—Electron-beam welding or cutting
    • B23K15/0046—Welding
    • B23K15/0053—Seam welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K15/00—Electron-beam welding or cutting
    • B23K15/0046—Welding
    • B23K15/0093—Welding characterised by the properties of the materials to be welded
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/08—Devices involving relative movement between laser beam and workpiece
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/20—Bonding
    • B23K26/21—Bonding by welding
    • B23K26/24—Seam welding
    • B23K26/28—Seam welding of curved planar seams
    • B23K26/282—Seam welding of curved planar seams of tube sections
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
    • B23K31/12—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to investigating the properties, e.g. the weldability, of materials
    • B23K31/125—Weld quality monitoring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • B23P15/001—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass valves or valve housings
    • B23P15/002—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass valves or valve housings poppet valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
    • F01L3/12—Cooling of valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/003—Pistons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/006—Vehicles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49229—Prime mover or fluid pump making
    • Y10T29/49298—Poppet or I.C. engine valve or valve seat making
    • Y10T29/49307—Composite or hollow valve stem or head making
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49764—Method of mechanical manufacture with testing or indicating
    • Y10T29/49771—Quantitative measuring or gauging
    • Y10T29/49774—Quantitative measuring or gauging by vibratory or oscillatory movement

Abstract

The present invention relates to a method to produce a built hollow valve (1) of an internal combustion engine comprising a valve stem (2), a valve cone (3) and a valve bottom (4) wherein: (a) the valve cone (3) is pressed in press fit on the valve stem (2) of the hollow valve (1); and (b) the valve cone (3) is welded with the valve stem (2) by a laser beam/electron beam (7), the welding process being performed such that the valve cone (3) is not melted on an outer surface (6) of a surface area (9) to be subsequently tested.

Description

METHOD FOR PRODUCING A BUILT HOLLOW VALVE

The present invention relates to a method of making a built-in hollow valve. The present invention also relates to a hollow valve manufactured according to the above method.

From DE 198 04 053 A1, lightweight construction valves for internal combustion engines with a ratio of wall thickness to stem diameter of less than 1: 3 are known. This minimizes deformation of the valve head. In this case, according to one embodiment, a valve cone is formed and integrally welded to the valve stem, and according to another embodiment, welded to the valve stem by a weld connection.

From DE 10 2004 010 309 A1, an additional hollow valve with hollow valve stem and valve disc is known, in which the valve cone is welded to the valve stem and welded to the valve bottom.

In order to meet increasingly stringent safety requirements, a built-in hollow valve needs to be provided to create a testing surface located at the point where the valve cone transitions to the valve stem Through the test surface, for example, a built-in hollow valve can be subjected to quality testing by ultrasonic. The test surface must be smooth on the one hand and considerably large on the other, so that the weld seam depth can be wholly covered. When the valve cone and valve stem are welded together, only an irregular weld seam course may be implemented so far, so it is not possible to test the weld seam reliably and reproducibly, or only under very difficult circumstances.

It is therefore an object of the present invention to describe a method for manufacturing a built-in hollow valve and to make it possible to manufacture a hollow valve by means of said built-in hollow valve, It is in solving the problem.

According to the invention, the problem is solved by the subject matter of the independent claim. Preferred embodiments are subject of the dependent claims.

The present invention is based on the general concept of making a built-in hollow valve of an internal combustion engine so as to prevent the outer surface of the valve cone from melting when the valve cone is welded to the valve stem, including valve stem, valve cone and valve bottom, , There is no need to be further processed and the optimally configured test surface is ready for quality conditions sufficient to test the hollow valve. With the method according to the invention, the valve cone is initially pushed onto the valve stem of the hollow valve in a press fit, and then the valve cone is pushed by, for example, a laser to prevent the outer surface of the valve cone from melting Valve stem. To this end, while welding the valve stem to the valve cone, the laser is fixed so that the laser beam of the laser forms an angle < 25 ° with respect to the axis of the valve stem. Through the process of fixing the laser relatively flat relative to the valve stem, the valve cone can be prevented from melting on the outer surface, so that the subsequent test surface is not damaged. Until recently, a clearance fit has been provided between the valve stem and the valve cone, especially when manufacturing a conventional hollow valve to allow the valve cone to be easily pressed onto the valve stem. However, through the gaps formed during the process, the laser beam must start from a larger angle relative to the axis of the valve stem to ensure safe welding. In addition, if the angle of the laser beam to the axis of the valve stem is greater, the outer surface of the valve cone melts, and as a result, it is no longer possible to form soft test surfaces. Conversely, using the method according to the invention, a weld seam can be formed which is uniformly running around the circumference of the valve stem, and at the same time, The test surface that is needed for the test can be maintained.

Using a further preferred refinement of the solution according to the invention, in accordance with the invention, the welded shim made of metal can be continuously tested by ultrasound. By testing the manufactured welded shim, it is possible to test the quality of the manufactured hollow valve, so that the hollow valve can maintain the highest quality standard. In particular, a test surface of width a > = 0.5 mm can be achieved through the method according to the invention, which is essential for carrying out reproducible quality testing.

Further important features and advantages of the present invention are obtained from the description of the dependent claims, drawings and drawings.

It should be understood that the features described above and described above may be used in combination with each other, as well as in different combinations themselves or in other combinations without departing from the scope of the present invention.

Preferred exemplary embodiments of the present invention are illustrated in the drawings and described in more detail below, wherein like reference numerals designate identical, similar, or functionally identical components.
1 is a schematic view of a hollow valve according to the present invention during a manufacturing process,
Figure 2 is an exploded view of a hollow valve according to the present invention to illustrate pressure fitting between a valve cone and a valve stem.

1, there is shown a method for manufacturing a built-in hollow valve 1 of an internal combustion engine, which is not shown in the other cases, wherein the hollow valve 1 comprises a valve stem 2, a valve cone 3, (4). In this case, the valve cone 3 is pressed or pressed onto the valve stem 2 with a press fit and then welded to the valve stem 2 by means of a laser 5, Is performed so that the outer surface 6 of the valve cone 3 is never melted. In this case, the pressure fitting of the outer surface 6 of the valve cone 3 should be understood to be embodied in the outer surface 6 of the valve cone 3. Thus, during the welding process, the laser beam / electron beam 7 of the laser 5 has an angle < 25 DEG with respect to the axis 8 of the valve stem 2, preferably an angle < Respectively. Before the valve cone 3 is pressed onto the valve stem 2, step a.) Is carried out, for example, the valve stem 2 may be welded to the valve bottom 4. In this case, it is also apparent that the valve stem 2 may be arranged integrally with the valve bottom 4. After the valve stem 2 is welded to the valve cone 3, a process of welding the valve cone 3 to the valve bottom 4 on the edge side is typically carried out.

In this case, on the one hand, the magnitude of the pressure fit between the valve stem 2 and the valve cone 3 on the other hand is usually between 0.02 mm and 0.11 mm. 2, the outer diameter d a of the valve stem 2 is about 0.02 mm to 0.11 mm greater than the inner diameter d i of the valve cone 3.

By means of the method according to the invention, an optimized and smooth testing surface can be additionally created on the outer surface 6 of the valve cone 3 and the width or axial depth a of the test surface The size is more than 0.5 mm and the maximum is 1.5 mm. The axial depth a must be longer than the axial depth of the welded padding 10 formed by the laser beam 7 and the axial depth of the welded paddle is completely covered, Lt; RTI ID = 0.0 > 11 < / RTI >

Through the method according to the invention, the welded padding 10 which is formed symmetrically can be formed. Through the acute angle between the axis 8 of the valve stem 2 and the laser beam / electron beam 7, the test surface 9, i.e. the outer surface 6 in this region, remains intact (remains unimpaired, thus being optimally prepared for future quality testing, especially ultrasound testing.

Through the pressure fitting between the valve cone 3 and the valve stem 2, no gaps are created, thus a significantly larger angle of the laser beam 7 is required. Through the pressure fitting, the laser 5 can be fixed fairly flat against the axis 8 of the valve stem 2, and nonetheless, a high quality welding padding 10 can be formed. At the same time, the flat electron beam of the laser beam 7 prevents the valve cone 3 from melting in the area of the test surface 9 and, after producing the hollow valve 1 according to the invention, The ultrasonic test by the ultrasonic testing device 11 is directly performed without the additional operation or preparation of the ultrasonic testing device 9. By using the method according to the present invention, the hollow valve 1 can be manufactured with high quality and reproducible.

Claims (9)

1. A method of manufacturing a built-in hollow valve (1) for an internal combustion engine, comprising a valve stem (2), a valve cone (3) and a valve bottom (4)
a.) The valve cone (3) is pressed onto the valve stem (2) of the hollow valve (1) by pressure fitting,
b.) The valve cone 3 is welded to the valve stem 2 by means of a laser beam / electron beam 7 and the welding process is carried out on the outer surface of the valve cone 3 in the area of the next test surface 9 6) is not melted. The method according to claim 1,
Characterized in that during the welding process the laser beam (7) of the laser (5) forms an angle < 25 ° with respect to the axis (8) of the valve stem (2). 3. The method according to claim 1 or 2,
Characterized in that the weld padding (10) formed by the laser (5) is tested by ultrasonic waves. 4. The method according to any one of claims 1 to 3,
Characterized in that the valve stem (2) is welded to the valve bottom (4) before step a.). 5. The method according to any one of claims 1 to 4,
Characterized in that the valve cone (3) is welded to the valve bottom (4) prior to step b.). A hollow valve (1) produced by the method according to any one of claims 1 to 5,
The size of the pressure fit between the valve stem (2) and the valve cone (3) is typically between 0.02 mm and 0.11 mm. The method according to claim 6,
Characterized in that the magnitude of the angle between the axis (8) of the valve stem (2) and the laser beam (7) is? <25 °. 8. The method according to claim 6 or 7,
Characterized in that the weld padding (10) between the valve cone (3) and the valve stem (2) is symmetrical. 9. The method according to any one of claims 6 to 8,
Characterized in that the test surface (9) has a width in the axial depth of 0.5 mm &lt; = a &lt; 1.5 mm.
KR20140070708A 2013-06-11 2014-06-11 Method for producing a built hollow valve KR20140145083A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013210899.0 2013-06-11
DE102013210899.0A DE102013210899A1 (en) 2013-06-11 2013-06-11 Method for producing a built-up hollow valve

Publications (1)

Publication Number Publication Date
KR20140145083A true KR20140145083A (en) 2014-12-22

Family

ID=52004359

Family Applications (1)

Application Number Title Priority Date Filing Date
KR20140070708A KR20140145083A (en) 2013-06-11 2014-06-11 Method for producing a built hollow valve

Country Status (5)

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US (1) US9382820B2 (en)
JP (1) JP2014240654A (en)
KR (1) KR20140145083A (en)
CN (1) CN104227241A (en)
DE (1) DE102013210899A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015116010A1 (en) * 2015-09-22 2017-03-23 Federal-Mogul Valvetrain Gmbh Cooled valve for internal combustion engines with relief groove

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2371548A (en) * 1943-12-06 1945-03-13 Thomas F Saffady Valve
DE4024084A1 (en) * 1989-11-29 1991-06-06 Daimler Benz Ag METHOD FOR PRODUCING HOLLOW GAS EXCHANGE VALVES FOR LIFTING PISTON MACHINES
DE19804053A1 (en) 1998-02-03 1999-08-05 Mwp Mahle J Wizemann Pleuco Gm Lightweight valve
US6365873B1 (en) * 1999-06-01 2002-04-02 Bechtel Bwxt Idaho, Llc Apparatus for the concurrent inspection of partially completed welds
DE10256274A1 (en) * 2001-12-27 2003-07-17 Mahle Ventiltrieb Gmbh Producing method of gas shuttle valve for internal combustion engine involves correctly fitting and permanently bonding valve shaft and thrust section to predetermined length
ITMI20012837A1 (en) * 2001-12-28 2003-06-28 Abb Service Srl METHOD FOR WELDING CONTACT PLATES AND CONTACT ELEMENTS OBTAINED BY SUCH METHOD
DE10209346B4 (en) * 2002-03-02 2004-02-19 Daimlerchrysler Ag Manufacturing method for a multi-part valve for internal combustion engines
DE10354086B4 (en) * 2003-11-19 2005-11-24 Daimlerchrysler Ag lightweight valve
US7240895B2 (en) * 2004-03-03 2007-07-10 Mahle Ventiltrieb Gmbh Gas exchange valve for an internal combustion engine
DE102004010309A1 (en) 2004-03-03 2005-09-22 Mahle Ventiltrieb Gmbh Gas exchange valve of an internal combustion engine
DE102005027130A1 (en) 2005-06-11 2006-12-14 Mahle International Gmbh Gas exchange valve of an internal combustion engine
JP2008145319A (en) * 2006-12-12 2008-06-26 Daido Steel Co Ltd Method for inspecting padding portion of engine valve

Also Published As

Publication number Publication date
JP2014240654A (en) 2014-12-25
US20140360452A1 (en) 2014-12-11
DE102013210899A1 (en) 2014-12-11
CN104227241A (en) 2014-12-24
US9382820B2 (en) 2016-07-05

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